PanelBar / Data Bindings

        <telerik:RadPanelBar 
            id="RadPanelBar1" 
            runat="server" 
            DataSourceID="AccessDataSource1"
            DataFieldID="id"
            DataFieldParentID="ParentId">

        <DataBindings>
             <telerik:RadPanelItemBinding TextField="Text" />
             <telerik:RadPanelItemBinding FormatString="Level 1 > {0}" TextField="Text" Depth="1" />
        </DataBindings>

        </telerik:RadPanelBar>